The (stereo) Khartago was the only amp of several that worked without issue (that is, to my ears) with the Tempest Extreme I have. It's the first all SS pairing that has allowed me to listen all day in my listening room/office (often 10 hours or more).
Using the tube Dynaco PAS-4, once needed for all day listening to fray my jangled nerves and ears, I now find it lacking in dynamics and prefer the Tempest Extreme. It's remote, too, all the better. Quite a great phono stage in the Tempest, too.
So impressed was I with the Khartago (it had an upgraded board in it for $90 extra new), that I let Klaus talk me into a pair of Khartago Mono's. They'll be in here sometime - I'm simply delighted with the Odyssey sound experience.